yea scuba, was the same way with me, i had about an hour of good shots, and then the whole thing was invisible for the rest of the night.
. our guide told us the same thing about hardly ever seeing it clear at night. either its a ploy for better tips or we both were pretty darn fortunate. wish i could have had several mintune exposures, but i dont own the timer remote... yet... i always have it in my B&H cart... and then when time comes to say, i cant really afford all that, it seems (along with the set of ND filters i want) to be the first out of the cart and back on the wishlist. if i ever go to a live volcano again there is no question haha.

